1. Department of Otolaryngology, Head and Neck Surgery, University of Louvain, Brussels
2. Department of Vascular and Interventional Radiology, University of Louvain, Brussels
3. Department of Otolaryngology, Head and Neck Surgery, University of Dundee, Dundee
4. Department of Radiation Oncology, University of Louvain, Brussels
5. Department of Oncology, University of Louvain, Brussels